/Engine/Plugins/Developer/Concert/ConcertUI/ConcertSharedSlate/Source/ConcertSharedSlate/Public/ConcertFrontendUtils.h
Returns the image used to render the expandable area title bar with respect to its hover/expand state.
namespace ConcertFrontendUtils { const [FSlateBrush](API\Runtime\SlateCore\Styling\FSlateBrush) * ConcertFrontendUtils::GetExpandableAreaBorderImage ( const [SExpandableArea](API\Runtime\Slate\Widgets\Layout\SExpandableArea) & Area ) }